Practice Quiz

SAT Chemistry - Question List

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51. A 40.0 gram sample of a radioactive element decays to 5.0 grams in 15 hours. What is the half-life of this element?
  1. 3 hours
  2. 2 hours
  3. 6 hours
  4. 7.5 hours
  5. 5 hours
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52. HNO2(aq) + H2O --> NO2-(aq) + H30+(aq)

In this reaction, NO2-(aq) is best classified as a(n)
  1. Acid
  2. Base
  3. Cation
  4. Salt
  5. Electrically neutral species
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53. Which of the following species is classified as an electrolyte?
  1. CH4
  2. C6H12O6
  3. N2
  4. Na+
  5. O3
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54. Which of the following laws states that it is impossible to known the position and momentum of an electron simultaneously?
  1. Pauli exclusion principle
  2. Heisenberg's uncertainty principle
  3. Hund's rule
  4. Grahm's law
  5. Ampere's law
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55. Compound X donates a pair of electrons in a chemical reaction. This compound is best classified as a(n)
  1. Arrhenius acid
  2. Bronsted acid
  3. Lewis acid
  4. Lewis base
  5. Halogen
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